'use client'

import * as React from 'react'
import * as RechartsPrimitive from 'recharts'
import type { LegendPayload } from 'recharts/types/component/DefaultLegendContent'
import { NameType, Payload, ValueType } from 'recharts/types/component/DefaultTooltipContent'
import type { Props as LegendProps } from 'recharts/types/component/Legend'
import { TooltipContentProps } from 'recharts/types/component/Tooltip'

import { cn } from '~/utils'

// Format: { THEME_NAME: CSS_SELECTOR }
const THEMES = { light: '', dark: '.dark' } as const

export type ChartConfig = {
  [k in string]: {
    label?: React.ReactNode
    icon?: React.ComponentType
  } & (
    | { color?: string; theme?: never }
    | { color?: never; theme: Record<keyof typeof THEMES, string> }
  )
}

type ChartContextProps = {
  config: ChartConfig
}

export type CustomTooltipProps = TooltipContentProps<ValueType, NameType> & {
  className?: string
  hideLabel?: boolean
  hideIndicator?: boolean
  indicator?: 'line' | 'dot' | 'dashed'
  nameKey?: string
  labelKey?: string
  labelFormatter?: (
    label: TooltipContentProps<number, string>['label'],
    payload: TooltipContentProps<number, string>['payload']
  ) => React.ReactNode
  formatter?: (
    value: number | string,
    name: string,
    item: Payload<number | string, string>,
    index: number,
    payload: ReadonlyArray<Payload<number | string, string>>
  ) => React.ReactNode
  blockFormatter?: boolean
  labelClassName?: string
  color?: string
}

export type ChartLegendContentProps = {
  className?: string
  hideIcon?: boolean
  verticalAlign?: LegendProps['verticalAlign']
  payload?: LegendPayload[]
  nameKey?: string
}

const ChartContext = React.createContext<ChartContextProps | null>(null)

function useChart(): ChartContextProps {
  const context = React.useContext(ChartContext)

  if (!context) {
    throw new Error('useChart must be used within a <ChartContainer />')
  }

  return context
}

function ChartContainer({
  id,
  className,
  children,
  overlay,
  config,
  ...props
}: React.ComponentProps<'div'> & {
  config: ChartConfig
  children: React.ComponentProps<typeof RechartsPrimitive.ResponsiveContainer>['children']
  overlay?: React.ReactNode
}): React.JSX.Element {
  const uniqueId = React.useId()
  const chartId = `chart-${id || uniqueId.replace(/:/g, '')}`

  return (
    <ChartContext.Provider value={{ config }}>
      <div
        data-slot="chart"
        data-chart={chartId}
        className={cn(
          "[&_.recharts-cartesian-axis-tick_text]:fill-muted-foreground [&_.recharts-cartesian-axis-tick_text]:select-none [&_.recharts-cartesian-grid_line[stroke='#ccc']]:stroke-border/50 [&_.recharts-curve.recharts-tooltip-cursor]:stroke-border [&_.recharts-polar-grid_[stroke='#ccc']]:stroke-border [&_.recharts-radial-bar-background-sector]:fill-muted [&_.recharts-rectangle.recharts-tooltip-cursor]:fill-muted [&_.recharts-reference-line_[stroke='#ccc']]:stroke-border flex aspect-video justify-center text-xs [&_.recharts-dot[stroke='#fff']]:stroke-transparent [&_.recharts-layer]:outline-hidden [&_.recharts-sector]:outline-hidden [&_.recharts-sector[stroke='#fff']]:stroke-transparent [&_.recharts-surface]:outline-hidden",
          'relative',
          className
        )}
        {...props}
      >
        <ChartStyle id={chartId} config={config} />
        <RechartsPrimitive.ResponsiveContainer>{children}</RechartsPrimitive.ResponsiveContainer>
        {overlay && <div className="absolute inset-0 pointer-events-none">{overlay}</div>}
      </div>
    </ChartContext.Provider>
  )
}

const ChartStyle = ({
  id,
  config
}: {
  id: string
  config: ChartConfig
}): React.JSX.Element | null => {
  const colorConfig = Object.entries(config).filter(([, config]) => config.theme || config.color)

  if (!colorConfig.length) {
    return null
  }

  return (
    <style
      dangerouslySetInnerHTML={{
        __html: Object.entries(THEMES)
          .map(
            ([theme, prefix]) => `
            ${prefix} [data-chart=${id}] {
            ${colorConfig
              .map(([key, itemConfig]) => {
                const color =
                  itemConfig.theme?.[theme as keyof typeof itemConfig.theme] || itemConfig.color
                return color ? `  --color-${key}: ${color};` : null
              })
              .join('\n')}
            }
            `
          )
          .join('\n')
      }}
    />
  )
}

const ChartTooltip = RechartsPrimitive.Tooltip

function ChartTooltipContent({
  active,
  payload,
  label,
  className,
  indicator = 'dot',
  hideLabel = false,
  hideIndicator = false,
  labelFormatter,
  formatter,
  blockFormatter = false,
  labelClassName,
  color,
  nameKey,
  labelKey
}: CustomTooltipProps): React.JSX.Element | null {
  const { config } = useChart()

  const tooltipLabel = React.useMemo(() => {
    if (hideLabel || !payload?.length) {
      return null
    }

    const [item] = payload
    const key = `${labelKey || item?.dataKey || item?.name || 'value'}`
    const itemConfig = getPayloadConfigFromPayload(config, item, key)
    const value = (() => {
      const v =
        !labelKey && typeof label === 'string'
          ? (config[label as keyof typeof config]?.label ?? label)
          : itemConfig?.label

      return typeof v === 'string' || typeof v === 'number' ? v : undefined
    })()

    if (labelFormatter) {
      return (
        <div className={cn('font-medium', labelClassName)} style={{ whiteSpace: 'pre-wrap' }}>
          {labelFormatter(value, payload)}
        </div>
      )
    }

    if (!value) {
      return null
    }

    return <div className={cn('font-medium', labelClassName)}>{value}</div>
  }, [label, labelFormatter, payload, hideLabel, labelClassName, config, labelKey])

  if (!active || !payload?.length) {
    return null
  }

  const nestLabel = payload.length === 1 && indicator !== 'dot'

  return (
    <div
      className={cn(
        'bg-background/(--glass-opacity) backdrop-filter backdrop-blur-[32px] grid min-w-[8rem] items-start gap-1.5 rounded-lg px-2.5 py-1.5 text-xs shadow-xl',
        className
      )}
    >
      {!nestLabel ? tooltipLabel : null}
      {!blockFormatter && (
        <div className="grid gap-1.5">
          {payload.map((item, index) => {
            const key = `${nameKey || item.name || item.dataKey || 'value'}`
            const itemConfig = getPayloadConfigFromPayload(config, item, key)
            const indicatorColor = color || item.payload.fill || item.color

            return (
              <div
                key={item.dataKey}
                className={cn(
                  '[&>svg]:text-muted-foreground flex w-full flex-wrap items-stretch gap-2 [&>svg]:h-2.5 [&>svg]:w-2.5',
                  indicator === 'dot' && 'items-center'
                )}
              >
                {formatter && item?.value !== undefined && item.name ? (
                  formatter(item.value, item.name, item, index, item.payload)
                ) : (
                  <>
                    {itemConfig?.icon ? (
                      <itemConfig.icon />
                    ) : (
                      !hideIndicator && (
                        <div
                          className={cn(
                            'shrink-0 rounded-[2px] border-(--color-border) bg-(--color-bg)',
                            {
                              'h-2.5 w-2.5': indicator === 'dot',
                              'w-1': indicator === 'line',
                              'w-0 border-[1.5px] border-dashed bg-transparent':
                                indicator === 'dashed',
                              'my-0.5': nestLabel && indicator === 'dashed'
                            }
                          )}
                          style={
                            {
                              '--color-bg': indicatorColor,
                              '--color-border': indicatorColor
                            } as React.CSSProperties
                          }
                        />
                      )
                    )}
                    <div
                      className={cn(
                        'flex flex-1 justify-between leading-none',
                        nestLabel ? 'items-end' : 'items-center'
                      )}
                    >
                      <div className="grid gap-1.5">
                        {nestLabel ? tooltipLabel : null}
                        <span className="text-muted-foreground">
                          {itemConfig?.label || item.name}
                        </span>
                      </div>
                      {item.value && (
                        <span className="text-foreground font-mono font-medium tabular-nums">
                          {item.value.toLocaleString()}
                        </span>
                      )}
                    </div>
                  </>
                )}
              </div>
            )
          })}
        </div>
      )}
    </div>
  )
}

const ChartLegend = RechartsPrimitive.Legend

function ChartLegendContent({
  className,
  hideIcon = false,
  payload,
  verticalAlign = 'bottom',
  nameKey
}: ChartLegendContentProps): React.JSX.Element | null {
  const { config } = useChart()

  if (!payload?.length) {
    return null
  }

  return (
    <div
      className={cn(
        'flex items-center justify-center gap-4',
        verticalAlign === 'top' ? 'pb-3' : 'pt-3',
        className
      )}
    >
      {payload.map((item) => {
        const key = `${nameKey || item.dataKey || 'value'}`
        const itemConfig = getPayloadConfigFromPayload(config, item, key)

        return (
          <div
            key={item.value}
            className={cn(
              '[&>svg]:text-muted-foreground flex items-center gap-1.5 [&>svg]:h-3 [&>svg]:w-3'
            )}
          >
            {itemConfig?.icon && !hideIcon ? (
              <itemConfig.icon />
            ) : (
              <div
                className="h-2 w-2 shrink-0 rounded-[2px]"
                style={{
                  backgroundColor: item.color
                }}
              />
            )}
            {itemConfig?.label}
          </div>
        )
      })}
    </div>
  )
}

// Helper to extract item config from a payload.
function getPayloadConfigFromPayload(
  config: ChartConfig,
  payload: unknown,
  key: string
):
  | ({
      label?: React.ReactNode
      icon?: React.ComponentType
    } & (
      | {
          color?: string
          theme?: never
        }
      | {
          color?: never
          theme: Record<keyof typeof THEMES, string>
        }
    ))
  | undefined {
  if (typeof payload !== 'object' || payload === null) {
    return undefined
  }

  const payloadPayload =
    'payload' in payload && typeof payload.payload === 'object' && payload.payload !== null
      ? payload.payload
      : undefined

  let configLabelKey: string = key

  if (key in payload && typeof payload[key as keyof typeof payload] === 'string') {
    configLabelKey = payload[key as keyof typeof payload] as string
  } else if (
    payloadPayload &&
    key in payloadPayload &&
    typeof payloadPayload[key as keyof typeof payloadPayload] === 'string'
  ) {
    configLabelKey = payloadPayload[key as keyof typeof payloadPayload] as string
  }

  return configLabelKey in config ? config[configLabelKey] : config[key as keyof typeof config]
}

export {
  ChartContainer,
  ChartLegend,
  ChartLegendContent,
  ChartStyle,
  ChartTooltip,
  ChartTooltipContent
}
